ICD-10-CM > V00-Y99 > W20-W49 > W33 > W33.1 > W33.12 W33.12 Accidental malfunction of hunting rifle Non-Billable/Non-Specific Applicable To Malfunction of hunting rifle NOS Codes W33.12XA..., initial encounterW33.12XD..., subsequent encounterW33.12XS..., sequela